Yes I do believe he hacks. Second demo he's puting crosshair on a guy named "hard" that is totaly unreachable lol and then his kills are also fishy, right on target, but he could hear them, so cuz of that it's not enough proof. The 2nd round in 2nd demo on short he's also tracing "I Dont Know", then starts some weird shaking movements like he is faking it. So all in all if we put everything together I think he hacks although proofs are not the best.

I do think he hacks as well, he "tries" to hide too much it seems like, lol there's some overacting right there and he really plays like someone who doesn't know how to play at all. It is nice of you to actually ask people before banning when you're not 100% sure, that's a good thing to do! I just banned him by the way.
Ban Link: http://irgamerz.com/amxbans/ban_list.php?bid=43804